Higher nonlinear indices, Raman gain coefficients, and bandwidths in the TeO2–ZnO–Nb2O5–MoO3 quaternary glass system

A quaternary glass system, TeO2–ZnO–Nb2O5–MoO3, with higher linear and nonlinear indices, third order optical susceptibility (χ3), and Raman gain coefficient and gain bandwidth is reported. The χ3 of these glasses are ∼80 times higher than the silica glass and 1.6 times higher than pure TeO2 glass; Raman gain coefficient is 40 times higher than the silica glass. Amplification bandwidth of one of the glasses is 1.7 times larger than the silica glass. The present glass has a glass transition temperature 80°C lower than the previously reported tellurite showing large Raman amplification bandwidth. These features make the TeO2–ZnO–Nb2O5–MoO3 glass a potential material for photonics devices such as fiber Raman amplifiers and/or nonlinear optical signal processing devices.

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